In four appearances for the undermanned C’s, Johnson has impressed, averaging 10.0 points, 3.3 rebounds and 1.0 assists in 26.8 minutes while filling in for Avery Bradley[4] (ankle), Jerryd Bayless (toe) and Keith Bogans (just chilling). Bayless is expected to return to the Celtics[3] lineup on Tuesday.

Johnson’s first 10-day contract expired after Sunday’s loss to the Nets[5], and his signing to a second such deal prior to Tuesday’s game will keep him on the roster for the next four games against New York, Philadelphia (twice) and the Magic.

On Feb. 6, the Celtics[3] will be faced with a decision on whether to sign the Dayton[6] product for the remainder of the season or let him walk, since players are limited to two consecutive 10-day contracts for the same organization.